Buggy code:
public class BitcoinCryptoNetworkDatabaseDao { Database database ; UUID pluginId ; PluginDatabaseSystem pluginDatabaseSystem ; public BitcoinCryptoNetworkDatabaseDao ( UUID pluginId , PluginDatabaseSystem pluginDatabaseSystem ) { } public void initializeDatabase ( ) throws CantInitializeBitcoinCryptoNetworkDatabaseException { } public void updateCryptoVaultsStatistics ( CryptoVaults cryptoVault , int monitoredPublicKeys ) throws CantExecuteDatabaseOperationException { } public void saveNewIncomingTransaction ( String hash , String blockHash , CryptoStatus cryptoStatus , int blockDepth , CryptoAddress addressTo , CryptoAddress addressFrom , long value , String op_Return , ProtocolStatus protocolStatus ) throws CantExecuteDatabaseOperationException { } private void saveNewTransaction ( @ Nullable UUID transactionId , String hash , String blockHash , CryptoStatus cryptoStatus , int blockDepth , CryptoAddress addressTo , CryptoAddress addressFrom , long value , String op_Return , ProtocolStatus protocolStatus , TransactionTypes transactionTypes ) throws CantExecuteDatabaseOperationException { } private boolean isDuplicateTransaction ( UUID trxId ) throws CantExecuteDatabaseOperationException { } public CryptoStatus getTransactionCryptoStatus ( String txHash ) throws CantExecuteDatabaseOperationException { DatabaseTable cryptoTransactionsTable = database . getTable ( TRANSACTIONS_TABLE_NAME ) ; cryptoTransactionsTable . addStringFilter ( TRANSACTIONS_HASH_COLUMN_NAME , txHash , EQUAL ) ; try { cryptoTransactionsTable . loadToMemory ( ) ; } catch ( CantLoadTableToMemoryException e ) { throwLoadToMemoryException ( e , cryptoTransactionsTable . getTableName ( ) ) ; } List < DatabaseTableRecord > databaseTableRecordList = cryptoTransactionsTable . getRecords ( ) ; if ( databaseTableRecordList . isEmpty ( ) ) { <START_BUG> return null ; <END_BUG> } else { CryptoStatus lastCryptoStatus = null ; for ( DatabaseTableRecord record : databaseTableRecordList ) { CryptoStatus cryptoStatus = null ; try { cryptoStatus = CryptoStatus . getByCode ( record . getStringValue ( TRANSACTIONS_CRYPTO_STATUS_COLUMN_NAME ) ) ; } catch ( InvalidParameterException e ) { throw new CantExecuteDatabaseOperationException ( CantExecuteDatabaseOperationException . DEFAULT_MESSAGE , e , "the<seq2seq4repair_space>stored<seq2seq4repair_space>CryptoStatus<seq2seq4repair_space>is<seq2seq4repair_space>not<seq2seq4repair_space>valid." , null ) ; } if ( lastCryptoStatus == null ) lastCryptoStatus = cryptoStatus ; else if ( ( lastCryptoStatus . getOrder ( ) ) < ( cryptoStatus . getOrder ( ) ) ) lastCryptoStatus = cryptoStatus ; } return lastCryptoStatus ; } } private long getCurrentDateTime ( ) { } public void saveNewOutgoingTransaction ( UUID transactionId , String hash , String blockHash , CryptoStatus cryptoStatus , int blockDepth , CryptoAddress addressTo , CryptoAddress addressFrom , long value , String op_Return , ProtocolStatus protocolStatus ) throws CantExecuteDatabaseOperationException { } public boolean isIncomingTransaction ( String txHash ) throws CantExecuteDatabaseOperationException { } public CryptoStatus getStoredTransactionCryptoStatus ( @ Nullable TransactionTypes transactionType , String txHash ) throws CantExecuteDatabaseOperationException { } public int getPendingNotifiedTransactions ( TransactionTypes transactionType ) throws CantExecuteDatabaseOperationException { } public void updateEventAgentStats ( int pendingIncoming , int pendingOutgoing ) throws CantExecuteDatabaseOperationException { } public Set < CryptoStatus > getPendingCryptoStatus ( TransactionTypes transactionType ) throws CantExecuteDatabaseOperationException { } public void confirmReception ( UUID transactionID ) throws CantExecuteDatabaseOperationException { } private void confirmIncomingTransactionReception ( UUID transactionID ) throws CantExecuteDatabaseOperationException { } private void confirmOutgoingTransactionReception ( UUID transactionID ) throws CantExecuteDatabaseOperationException { } private void confirmTransactionReception ( UUID transactionID , TransactionTypes transactionType ) throws CantExecuteDatabaseOperationException { } public List < TransactionProtocolData > getPendingTransactionProtocolData ( ) throws CantExecuteDatabaseOperationException { } private List < TransactionProtocolData > getTransactionProtocolData ( TransactionTypes transactionType , @ Nullable ProtocolStatus protocolStatus ) throws CantExecuteDatabaseOperationException { } private CryptoTransaction getCryptoTransactionFromRecord ( TransactionTypes transactionType , DatabaseTableRecord record ) { } public Set < String > getStoredTransactionHash ( ) throws CantExecuteDatabaseOperationException { } public List < CryptoTransaction > getIncomingCryptoTransaction ( String txHash ) throws CantExecuteDatabaseOperationException { } private void throwLoadToMemoryException ( Exception e , String tableName ) throws CantExecuteDatabaseOperationException { } public void setTransactionProtocolStatus ( UUID transactionId , ProtocolStatus protocolStatus ) throws CantExecuteDatabaseOperationException { } public boolean isNewTransaction ( String txHash , CryptoStatus cryptoStatus ) throws CantExecuteDatabaseOperationException { } public void updateDetailedCryptoStats ( CryptoVaults cryptoVault , BlockchainNetworkType blockchainNetworkType , List < ECKey > keyList ) throws CantExecuteDatabaseOperationException { } public void deleteDetailedCryptoStats ( CryptoVaults cryptoVault , BlockchainNetworkType blockchainNetworkType ) throws CantExecuteDatabaseOperationException { } public List < TransactionProtocolData > getAllTransactionProtocolData ( ) throws CantExecuteDatabaseOperationException { } public void storeBitcoinTransaction ( BlockchainNetworkType blockchainNetworkType , String txHash , UUID transactionId , int peerCount , String peerIp ) throws CantExecuteDatabaseOperationException { } private Integer getBroadcastTableExecutionNumber ( ) { } public void deleteStoredBitcoinTransaction ( String txHash ) throws CantExecuteDatabaseOperationException { } public boolean transactionExistsInBroadcast ( String txHash ) throws CantExecuteDatabaseOperationException { } public BroadcastStatus getBroadcastStatus ( String txHash ) throws CantExecuteDatabaseOperationException { } public void setBroadcastStatus ( Status status , String txHash ) throws CantExecuteDatabaseOperationException { } public List < String > getBroadcastTransactionsByStatus ( BlockchainNetworkType blockchainNetworkType , Status status ) throws CantExecuteDatabaseOperationException { } public UUID getBroadcastedTransactionId ( BlockchainNetworkType blockchainNetworkType , String txHash ) throws CantExecuteDatabaseOperationException { } }

Fix:
return CryptoStatus . PENDING_SUBMIT ;